Pen



FIG. 1 is a right side elevational view of a pen showing my new design, the left side being a mirror image thereof;

FIG. 2 is a front elevational view with the cap removed for ease of illustration;

FIG. 3 is a rear elevational view of FIG. 2;

FIG. 4 is a top plan view of FIG. 1;

FIG. 5 is a bottom plan view of FIG. 2;

FIG. 6 is a front elevational view of a second embodiment of my new design;

FIG. 7 is a right side elevational view of FIG. 6 with the cap removed for ease of illustration, the left side being a mirror image thereof;

FIG. 8 is a rear elevational view of FIG. 6;

FIG. 9 is a top plan view of FIG. 6;

FIG. 10 is a bottom plan view of FIG. 7;

FIG. 11 is a front elevational view of a third embodiment of my new design, the rear view being a mirror image thereof;

FIG. 12 is a right side elevational view thereof with the cap removed for ease of illustration, the left side being a mirror image thereof;

FIG. 13 is a top plan view of FIG. 11; and,

FIG. 14 is a bottom plan view of FIG. 12. 

The ornamental design for a pen, as shown and described. 